Finally, the price of lumber is coming down. For instance, about three years ago, the price of OSB or wafer wood used to cost $6 a sheet. Last year the price shot up to nearly $20 a sheet. However, my latest quotes show that the price at Home Depot was $10.50 a sheet. However, some of the other lumber stores are still trying to make a few extra dollars by charging $13.50 a sheet. Always get current bids, because lumber is a commodity that changes daily.